package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.aliyun.oss.common.utils.HttpUtil;
import com.google.gson.JsonObject;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;

    @Autowired
    WeChatProperties weChatProperties;

    public static final String Login_url = "https://api.weixin.qq.com/sns/jscode2session";

    @Override
    public User login(UserLoginDTO loginDTO) {
        String openid = getOpenId(loginDTO);

        if (openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        User user = userMapper.findByOpenid(openid);
//      判断是否为新用户
        if (user==null){
            user= User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.add(user);
        }
//      返回用户对象
        return user;
    }

    private String getOpenId(UserLoginDTO loginDTO)
    {
        Map<String ,String> map=new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("grant_type","authorization_code");
        map.put("js_code", loginDTO.getCode());

        String json = HttpClientUtil.doGet(Login_url, map);

        JSONObject jsonObject = JSONObject.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
